Classification is an incredibly powerful application of Machine Learning techniques, and comprises the major part of its real-world usage, whether that means classifying Cancer cells as benign or malicious, cake as old or new, or even a street sign as Spanish or German. In this course, we will build on the skills you gained in studying regression as well, but a lot is going to be new.
Classification, in one sense, is not much different than regression. Just like with Regression, it involves fitting a curve to the data. But in this case, the curve is called a decision boundary. Based on where this goes, we'll decide on which data points fall in which category.1.2 Introduction to Decision Boundaries